![]() The kilogram is the other half of W/kg and is fairly straightforward. Most commonly, the watts in W/kg refers to your sustainable power (FTP). Technically speaking, a watt is a measurement of energy transfer measured in real-time while cycling with a power meter. ![]() Metrics like heart rate and speed are subject to outside influence, while power is objective and comparable in any condition. Torque is the amount of force you generate, and cadence is the speed you turn the pedals. In simple terms, power is equal to your torque multiplied by your cadence. You can think of this as a way to gauge how much work you are doing while riding a bike. Your W/kg directly influences your climbing ability and is a good metric of general cycling fitness. That said, increasing your power-to-weight ratio means that you have a greater proportion of lean muscle mass and a stronger aerobic engine. At speed, almost 90% of your power is used to overcome wind resistance. On flat or rolling terrain, aerodynamics and raw power play a massive role. ![]() It’s most important as the gradient becomes steep. However, watts per kilogram might be less important than you might think. More importantly, it gives you a nuanced way to understand your abilities and changes in body weight in relation to performance. Power-to-weight ratio can offer a more reasonable way to compare different riders’ abilities than by looking at power alone. But power doesn’t tell the whole story because lighter athletes require less energy to overcome gravity when the road tilts upward. In general, larger cyclists can put out more power than smaller ones. ![]() It directly affects performance, especially on long, steep climbs. It’s expressed as watts of cycling power produced per kilogram of body weight, abbreviated as W/kg. Watts per kilogram or power-to-weight ratio is a measurement of your power on the bike, in relation to your body weight. ![]()
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